Fig vi



(No Model.) 2 Sheetaa-Sheet 1.

J. M. CASE. GRAIN scomum.

No. 410, 069'. Patented Au 27,1889.

n PETERS. PhaloLilhographer. wmhin mn. n.c.

(No Model.)

2 Sheets-Sheet 2.

J. M. CASE.

GRAIN SGOURER.

Patented Aug. 27, 1889.

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UNITED STATES PATENT OFFICE.

JOHN M. CASE, OF COLUMBUS, OHIO, AssIeNoR TO THE CASE MANUFAOTUR- ING COMPANY, OF SAME PLACE.

GRAlN-SCOURER.

SPECIFICATION forming part of Letters Patent No. 410,069, dated August 27, 1889.

Application filed December 13, 1886. Serial No. 221,428. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN M. CASE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Grain-Scourers, of which the following is a full, clear, and exact description.

The invention consists in certain features of novelty, which are hereinafter particularly pointed out in the claims, being first fully described with reference to the accompanying drawings, in which I Figure I is a vertical longitudinal section of the improved machine. Figs. II and III are vertical transverse sections on the lines II II and III III, respectively, Fig. I, looking n the direction of the arrows.

Figs. IV, V, and VI are d etail perspective views of various forms of plates of which the scouring-cylinder may be constructed.

A represents the cylindrical shell or casin g, which is preferably formed of metal, in two semi-cylindrical sections a a, with semicircular ends, whose meeting edges are scarfed, as at a. One-half of each of the journal-boxes is formed integrally with each of these sections (1, the bearing-surfaces being preferably babbitted to protect them against wear. The two parts a a of the casing are held together by bolts (4*, passing through flanges projecting from the sides of the journal boxes. This cylindrical shell or casing is preferably of unequal dia1neter-that is to say, it is formed in two planes, united by an offset, as at (L The interior of the casing is divided into two compartments B and 0 by a transverse partition 0;, formed in two parts, united at their meeting edges by a scarf a,similarly to the meeting edges of the external shell and cutaway for the passage of the operatingshaft. The compartment B is the one in which the scouring is done, by means of an externally-toothed, corrugated, or otherwise roughened rubbing or scouring drumD,fiXed to an operating-shaft E, which may be driven by any suitable niechanismas, for example, a belt-passing over a pulley F. The interior wall of the compartment is lined with metallic plates Gr,- (preferably four in number,)'

whose surfaces may be ribbed or corrugated, as shown in Figs. II and IV, indented, as shown in Fig. V, or provided with short protuberances or pins, as shown in Fig. VI, the first form being, however, preferable. These plates are secured within the external shell or casing by means of screw-bolts g, as shown in Figs. I and II, their heads being countersunk, so as not to form uneven surfaces,

against which the grain could be crushed. 6o

The drum D is situated concentrically within the chamber B, and is of such diameter that an annular space as is left between itsperiphcry and the inner surface of the lining of the cylinder.

The distance between the contiguous surfaces of the drum D and its inclosing-cylinder should not exceed twice the, length of a grain of wheat, so that in the revolution of the cylinder the grains are forced one against another and against the corrugated or roughened surface until entirely freed from external impurities and thoroughly polished with out being abraded. It, is well known that by polishing the wheat the bran is toughened in such manner that on passing between the rolls or burrs in grinding the bran is much less liable to pulverize and become intermingled with the flour, and the degree of perfection with which this latter result is accom- 8o plished depends upon the thoroughness with which the polishing is done. I

I have found that much better results are accomplished by subjecting the grain in the scouring-cylinder to pressure, and according to my present invention this is done by feeding the grain thereinto through an opening at top from an upright chute or stand-pipe II, which communicates at its lower end directly with the annular space as between the go periphery of the drum and its inclosing-cylin'der. This pipe is broken off in the drawings for Want of room to show its full length-- drawn on the same scale as the other parts of the machine. height which is found necessary to produce the desired amount of pressure in the cylinder. It will be seen that the Weight of this vertical column of grain will press upon the grain within the cylinder and automatically 10o It may, however, be of any 5 feed it forward to the other or delivery end, whence it is discharged through an aperture a, formed through the top of the scouringcylinder B and into the dusting-cylinder 0 through an aperture a, formed through the offset portion a of the shell or casing. This aperture is provided with an adjustable valve I, whereby the discharge from and consequently the feed to the scouring-cylinder may be regulated.

The objects of my invention are best accomplished by locating the discharge-aperture a a" above the bottom of the scouringcylinder, for the reason that by so doing the passage of the grain therethrough is retarded and the cylinder kept full up to the level of said opening; hence it follows that by placing the discharge-opening at top the cylinder will be kept constantly full, it being impossible for any to escape until forced out by the superincumbent column of grain ini the stand-pipe.

\Vithin the dusting-cylinder C and concen- 5 trio with the shaft E is awire-gauze cylinder .I, through which the dust and fine impurities which have been dislodged from thegrain fall, or are forced by heaters or brushes K) carried by stout arms radiating from the. I do not desire to confine mypleasure, or both together, as shown in Fig.

III, this being the preferred form of the device. The impurities which pass through the screen are discharged through an opening L, 1

formed through the casing A and extending from end to end of the dusting-cylinder O. The scoured, polished, and dusted grain is discharged from the cylinder 0 through an opening a formed in the end wall of the casing, said opening being covered to any desired extent by a valve M, which is hinged at its lower side to the end wall of the casing, and isadapted to be swung in a vertical plane to any desired position and there fixed by an operating rod or stem m.

N N are a pair of plates or boards projecting in parallel vertical planes from the end wall of the chamber 0, one being placed at each side of the valve M and in close proximity thereto, so as to prevent the grain from reaching the opening a except by passing over the top of the valve M.

I am aware that grain-scourers have heretofore been supplied with grain through a vertical tube or spout; but I am not aware that this spout or tube has ever been used in connection with an outlet in the upper part of the cylinder, made of such diameter and height as to keep the scouring-cylinder continually full of grain under pressure.

I am also aware that it has been proposed to place within a cylinder a revoluble drum of such diameter as to leave between its periphery and the inner surface of the said casing an annular space, and of such length as to leave spaces between its ends and the ends of the casing, and to place in communication with one of these end spaces the lower end of a vertical pipe, by which the grain is fed to the machine. This, however, is not the equivalent of my invent-ion, according to which it is not designed to leave a space at either end of the drum, the stand-pipe being connected directly with the annular space between the periphery of the drum and the inner surface of the casing. By this arrangement it is obvious that the pressure upon the grain within the annular space is much greater than when the pipe communicates with the end space referred to, for the reason that the communication between the grain in said annular chamber and the source of pressure 6., the column of grain with the stand-pipe) is according to my invention more direct.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. A grain-cleaner comprising the combination of the following elements, to wit: a horizontal scouring-cylinder and a horizontal dusting-cylinder placed end to end, a dia phragm or partition between them having an aperture through which the interiors of said cylinders communicate, said aperture being situated above the bottom of said cylinders, to keep up the pressure in the scouring-cyl inder, a scouring-drum situated within the scouring-cylinder and leaving an annular space between its periphery and the inner surface of said cylinder, a reticulated cylinder situated within the dusting-cylinder, a revoluble beater situated within said reticulated cylinder, and a stand-pipe communicating directly with the annular space between the scouring-drum and cylinder, substantially as set forth.

2. In a grain-cleaner, the combination of the cylindrical shell or casing, the partition dividing it into two chambers B and C, and formed with an aperture through which the grain is discharged from the chamber B into the chamber C, a corrugated lining secured within the chamber 13, a revoluble rubbingdrum mounted to revolve in said chamber, a reticulated cylinder situated within the chamber O, and a rotary duster mounted within said cylinder, substantially as set forth.

3. The combination, with the casing having the discharge-aperture a and the boards N projecting from the inner wall of the casing in parallel vertical planes, one on each side of the aperture, of the valve M, situated between said boards and hinged at its lower edge, and means for adjusting said valve, substantially as set forth.

4. In a grain-cleaner, a shell or casing formed in two planes united by an offset, an aperture a through said offset, and an aperture a through the top of that portion of the shell which is of smaller diameter, in combination with a partition separating the interior of the shell or casing into two compartments,

a rubbing-drum situated'in one of said corn- 'partments, and a duster situated in the other, substantially as set forth.

5. The combination, with the horizontal cylinder and the partition dividing it into two chambers B O, and having the aperture through which said chambers communicate, of the stand-pipe communicating with the chamber B, the scouring-drum located in said oh amber, a valve for controlling the passage of the grain from the chamber B to the chamber 0, and a duster situated in the chamber C, substantially as and for the purposes set forth.

6. In a grain-scourer, the combination of a scouring-chamber B, having a stand-pipe H feeding into its top, an agitating-drum D, an

. outlet a in its upper part, and a valve a controlling said outlet, and a dusting-chamber into which said outlet a leads, said dustingchamber having the dusters K, reticulated cylinder J, an d outlet a said outlet being 10- cated in the end and having valve M, all substantially as shown and described.

JOHN M. CASE.

Witnesses:

HARRY E. KNIGHT, (EDWARD STEER. 

